Fig. 2From: Comparison of SaCoVLM™ video laryngeal mask-guided intubation and i-gel combined with flexible bronchoscopy-guided intubation in airway management during general anesthesia: a non-inferiority studyVLM Glottic exposure grades. Grade 1: visualization of the lateral part of the right aryepiglottic fold and part of the laryngeal inlet, and SpO2 > 98% after VLM ventilation; Grade 2: visualization of the bilateral aryepiglottic fold and part of laryngeal inlet, and SpO2 > 98% after VLM ventilation; Grade 3: visualization of all laryngeal inlet and posterior glottis; Grade 4: visualization of the whole glottisBack to article page